THE CAGE VEIL
Cages are called by their name because they surround the face with veiling. They fall into the category of the shorter ‘fashionista' veil, which has gained popularity in the past few years; so much so, they've almost become norm for formal as well as informal weddings. There's something chic, even edgy, about a bride sporting a wisp of veil over her eyes. The cage, aka birdcage, wrap, bandeau, was resurrected by indie designers going retro, creating early to mid-century hats and headpieces. 
Brides say the best thing about wearing a shorter veil is that they don’t have to do any adjusting in that switch from the solemnity of the ceremony to partying after. Short veils are also easy to maneuver around in and stay put, whether you’re exchanging vows, cutting cake, or dancing,
As you can see by taking a look at these images, there's more than one way to don a cage. Cages are a lot like hairstyles; they sometimes need to be adjusted with pins and patience to get the look you want, and this is where your hairdresser can be a Godsend. Cages are typically made from either tulle, the standard lightweight bridal veiling, or netting, which is wider and crisper, offering a more structured, high-fashion look. Netting is more transparent than tulle, which is why it's so popular for the cage.
TYPES OF NETTING
Russian Netting (a.k.a. French Netting): The standard for most cage veils. Has large, open diamond-shaped holes (3/8"-1"). Medium stiffness-holds a molded shape. Comes in nylon or polyester.
Merry Widow Netting: Has larger holes than Russian netting at 1" or more. Used in pieces that lend more drama. Quite stiff.
French Veiling: Lighter and more delicate than Russian netting with smaller diamond-shaped holes. Sometimes has velvety dots akin to point d'esprit.
Bridal Illusion: A.k.a. tulle. An airy fabric that adheres to stiffness when gathered or layered. Its lightweight hex mesh is most often seen in standard bridal veils. Works well for blusher or waterfall style cages that are layered. More opaque than netting.
Point d'Esprit: A.k.a. Swiss dot or dotted Swiss. A softer tulle or netting with flocked dots scattered throughout.
CREDITS
Photos 1&2: Bride Chic Photography
Photo 3: Henley Photography
Cage Veils and Dresses: Amy-Jo Tatum Bride
Read and see more images of cage veils
